35 citations · 135 across the 10 of their papers we have counts for
11 papers
Heavy QCD axion model in light of pulsar timing arrays
Moslem Ahmadvand, Ligong Bian, Soroush Shakeri
Recently, pulsar timing array experiments reported the observation of a stochastic gravitational wave background in the nanohertz range frequency band. We show that such a signal c…
Lepton and -boson mass anomalies in the DFSZ axion model
Moslem Ahmadvand, Fazlollah Hajkarim
With regard to the leptonic magnetic dipole moment anomaly as well as the -boson mass excess, we study the DFSZ axion model. Considering theoretical and experimental constraints…
The Higgs boson as a self-similar system: Towards a new solution to the hierarchy problem
M. Ahmadvand
We propose a new solution to the hierarchy (naturalness) problem, concerning quantum corrections of the Higgs mass. Assuming the Higgs boson as a system with a self-similar interna…
Filtered asymmetric dark matter during the Peccei-Quinn phase transition
M. Ahmadvand
In this paper, we propose a bubble filtering-out mechanism for an asymmetric dark matter scenario during the Peccei-Quinn (PQ) phase transition. Based on a QCD axion model, extende…
Confronting the magnetically-induced holographic composite inflation with observation
M. Ahmadvand, A. Ashoorioon, K. Bitaghsir Fadafan
We study the observational predictions of the phenomenological anti-de Sitter (AdS)/QCD inspired model, in which the inflaton field emerges in a four-dimensional strongly coupled g…
Gravitational waves of a first-order QCD phase transition at finite coupling from holography
M. Ahmadvand, K. Bitaghsir Fadafan, S. Rezapour
We consider a holographic study of coupling dependent gravitational waves produced by the cosmic first order QCD phase transition at finite baryochemical potential. In the dual des…
Electroweak phase transition in the presence of hypermagnetic field and the generation of gravitational waves
H. Abedi, M. Ahmadvand, S. S. Gousheh
We investigate the effects of a large-scale background hypermagnetic field on the electroweak phase transition. We propose a model in which an effective weak angle varies during th…
Electroweak baryogenesis via chiral gravitational waves
H. Abedi, M. Ahmadvand, S. S. Gousheh
We propose a new mechanism for electroweak baryogenesis based on gravitational waves generated by helical magnetic fields that are present during a first order electroweak phase tr…
The cosmic QCD phase transition with dense matter and its gravitational waves from holography
M. Ahmadvand, K. Bitaghsir Fadafan
Consistent with cosmological constraints, there are scenarios with the large lepton asymmetry which can lead to the finite baryochemical potential at the cosmic QCD phase transitio…
Gravitational waves generated from the cosmological QCD phase transition within AdS/QCD
M. Ahmadvand, K. Bitaghsir Fadafan
We study the gravitational waves produced by the collision of the bubbles as a probe for the cosmological first order QCD phase transition, considering heavy static quarks. Using A…
Energy loss at zero temperature from extremal black holes
Moslem Ahmadvand, Kazem Bitaghsir Fadafan
Using the AdS/CFT correspondence, we probe the extremal black holes by studying the energy loss of a moving heavy point particle in a strongly-coupled boundary field theory at zero…